JP7245614B2 - Liquid cleaning composition, cleaning agent, and cleaning method - Google Patents

Description

The present invention relates to liquid detergent compositions, detergents, and cleaning methods.

Traditionally, food processing plants, beverage plants, dairy plants, beer plants, etc., food and beverage equipment (e.g., food and beverage manufacturing equipment, filling machines, outer surfaces of manufacturing equipment such as mixing tanks, freezers, conveyors , floors, etc.), foaming cleaning compositions are used.

For example, in Patent Document 1, (A) 0.1 to 15.0% by weight of an alkaline agent, (B) 0.1 to 5.0% by weight of an anionic surfactant, and (C) the number of carbon atoms 0.5 to 5.0% by weight of an alkyldimethylamine oxide having an alkyl or alkylene group of 8 to 18, and (D) 0.1 to 4.0% of a fatty acid having 6 to 14 carbon atoms or a salt thereof. and (E) a chlorine-based oxidizing agent in an effective chlorine concentration of 0.1 to 7.0% based on the total composition. According to the foaming detergent composition, it is said that it has excellent foaming power and retention, and exhibits a high cleaning effect.

Further, for example, in Patent Document 2, alkyldimethylamine oxide as component (A), alkanesulfonic acid or its salt as component (B), aromatic sulfonic acid or its salt as component (C), and component (D) as A foaming detergent composition comprising an alkali metal hydroxide, an organic phosphonic acid or a salt thereof as the component (E), an alkali metal hypochlorite as the component (F), and water as the component (G). According to the foaming detergent composition, the cleaning property is excellent, there is no risk of corroding light metals such as aluminum, and the hardness component derived from the rinse water forms an insoluble salt after cleaning. It is said to be effective in cleaning beverage and food manufacturing plants and kitchens.

JP 2013-249383 A JP 2017-57345 A

As a result of studies by the present inventors, for example, conventional liquid detergent compositions as disclosed in Patent Documents 1 and 2, when containing a chlorine-based oxidizing agent such as hypochlorite, When stored in a high-temperature environment for a long period of time (for example, in a high-temperature environment of about 40°C for about one month), the liquid detergent composition may generate gas, causing problems such as expansion of the storage container. One thing became clear. Expansion of the storage container causes problems such as deformation of the container and liquid leakage. Therefore, transportation conditions and the like are required to deal with such situations.

In addition, when stored in such a high-temperature environment for a long period of time, the chlorine stability in a high-temperature environment may become insufficient, such as a decrease in the effective chlorine concentration of the liquid detergent composition. When the effective chlorine concentration of the cleaning agent is lowered, there is a problem that the detergency and bleaching power are lowered.

Further, liquid detergent compositions containing chlorine-based oxidizing agents are required to suppress corrosion of light metals such as aluminum.

The main object of the present invention is to provide a liquid detergent composition that exhibits excellent chlorine stability and gas generation suppression effect when stored for a long period of time in a high-temperature environment, and that further suppresses corrosion of light metals such as aluminum. as an issue. Another object of the present invention is to provide a cleaning agent and a cleaning method using the liquid cleaning agent composition. Another object of the present invention is to provide a cleaning method in a high-temperature environment.

The present inventors have made earnest studies to solve the above problems. As a result, (A) an alkaline agent, (B) an anionic surfactant, (C) an alkyldimethylamine oxide having an alkyl or alkylene group having 6 to 18 carbon atoms, and (D) an aromatic carboxylic acid or A liquid detergent composition containing a salt thereof, (E) a chlorine-based oxidizing agent, (F) silicic acid or its salt, and (G) water, wherein the content of (F) silicic acid or its salt is within a predetermined range , the excellent chlorine stability and the effect of suppressing gas generation in a high temperature environment are exhibited, and furthermore, it has been found that corrosion of light metals such as aluminum is also effectively suppressed. The present invention has been completed through further studies based on these findings.

That is, the present invention provides inventions in the following aspects.
Section 1. (A) an alkaline agent;
(B) an anionic surfactant;
(C) an alkyldimethylamine oxide having an alkyl or alkylene group having 6 to 18 carbon atoms;
(D) an aromatic carboxylic acid or a salt thereof;
(E) a chlorine-based oxidizing agent;
(F) silicic acid or a salt thereof;
(G) water;
including
A liquid detergent composition, wherein the content of (F) silicic acid or a salt thereof is 1.5 to 14.0% by mass.
Section 2. The (C) alkyldimethylamine oxide having an alkyl group or alkylene group having 6 to 18 carbon atoms is (c-1) an alkyldimethylamine oxide having 12 carbon atoms and (c-2) an alkyl having 8 carbon atoms. Item 2. The liquid detergent composition according to Item 1, comprising at least one alkyldimethylamine oxide having a group.
Item 3. The mass ratio of the (C) alkyldimethylamine oxide having an alkyl group or alkylene group having 6 to 18 carbon atoms or the (D) aromatic carboxylic acid or salt thereof is 1:10 to 20:1. 3. The liquid detergent composition according to item 1 or 2.
Section 4. Item 1, wherein the mass ratio of the (B) anionic surfactant and the (C) alkyldimethylamine oxide having an alkyl or alkylene group having 6 to 18 carbon atoms is 5:1 to 1:5. 4. The liquid detergent composition according to any one of 1 to 3.
Item 5. Item 5. The liquid detergent composition according to any one of Items 1 to 4, wherein the (E) chlorine-based oxidizing agent is contained in an amount such that the available chlorine concentration in the liquid detergent composition is 0.1 to 7.0% by mass. thing.
Item 6. Item 6. The liquid detergent composition according to any one of Items 1 to 5, which is used for cleaning food and drink manufacturing facilities.
Item 7. Item 7. The liquid detergent composition according to any one of Items 1 to 6, wherein the content of water (G) is 60 to 90% by mass.
Item 8. A cleaning agent comprising 2 to 40% by mass of the liquid cleaning composition according to any one of Items 1 to 7 and 60 to 98% by mass of dilution water.
Item 9. Item 9. The cleaning agent according to Item 8, which is in a foamed form.
Item 10. A step of mixing the liquid detergent composition according to any one of Items 1 to 7 and dilution water to prepare a detergent;
a step of foaming the cleaning agent and attaching it to an object to be cleaned;
a step of rinsing the cleaning agent adhering to the cleaning object with rinsing water;
A cleaning method comprising:

According to the present invention, there is provided a liquid detergent composition that exhibits excellent chlorine stability and gas generation suppression effect when stored for a long period of time in a high-temperature environment, and that furthermore, corrosion of light metals such as aluminum is suppressed. can be done. Furthermore, according to the present invention, it is also possible to provide a cleaning agent and a cleaning method using the liquid cleaning agent composition.

The liquid detergent composition of the present invention comprises (A) an alkaline agent, (B) an anionic surfactant, (C) an alkyldimethylamine oxide having an alkyl group or an alkylene group having 6 to 18 carbon atoms, ( D) an aromatic carboxylic acid or its salt, (E) a chlorine-based oxidizing agent, (F) silicic acid or its salt, and (G) water, and the content of (F) silicic acid or its salt is 1 .5 to 14.0% by mass. Since the liquid detergent composition of the present invention has such a constitution, it can be stored (including transportation environment) in a high temperature environment (eg, about 30 to 50° C.) for a long time (eg, about 1 month). In addition to exhibiting excellent chlorine stability and gas generation suppressing effect in the case of being used, corrosion of light metals such as aluminum can also be effectively suppressed. Hereinafter, the liquid detergent composition of the present invention, the detergent and the cleaning method using the liquid detergent composition will be described in detail.

In this specification, a numerical value connected by "-" means a numerical range including numerical values before and after "-" as a lower limit value and an upper limit value. If multiple lower limits and multiple upper limits are listed separately, any lower limit and upper limit can be selected and connected with "-".

(Liquid detergent composition)
The liquid detergent composition of the present invention contains the above components (A) to (G), and as described later, when used for cleaning an object to be cleaned, it is further diluted with dilution water to obtain the present Used as an inventive cleaning agent. The cleaning agent prepared from the liquid cleaning composition of the present invention is used for cleaning objects to be cleaned in a foamed form using a foam cleaning machine. That is, the liquid detergent composition of the present invention can be called a foaming liquid detergent composition. Further, the cleaning agent of the present invention can be called a foaming cleaning agent.

The liquid detergent composition of the present invention contains an alkaline agent as component (A). (A) The alkali agent is not particularly limited as long as it can be used in the liquid detergent composition, and examples thereof include potassium hydroxide and sodium hydroxide.

(A) As the alkali agent, only one kind may be used, or two or more kinds may be mixed and used.

The content of (A) the alkaline agent in the liquid detergent composition of the present invention is not particularly limited, but it is possible to achieve excellent chlorine stability and gas generation suppression when the liquid detergent composition is stored in a high-temperature environment for a long period of time. From the viewpoint of exhibiting the effect, the lower limit is preferably 0.1% by mass or more, more preferably 1.0% by mass or more, and still more preferably 2.0% by mass or more, and the upper limit is preferably 15.0% by mass or less, more preferably 10.0% by mass or less, and even more preferably 8.0% by mass or less.

The liquid detergent composition of the present invention contains an anionic surfactant as the component (B). (B) The anionic surfactant is not particularly limited as long as it can be used in a liquid detergent composition. Potassium secondary alkanesulfonate, sodium straight-chain alkylbenzenesulfonate having 10 to 14 carbon atoms, potassium straight-chain alkylbenzenesulfonate having 10 to 14 carbon atoms, and the like. Among these, sodium secondary alkanesulfonate having 13 to 17 carbon atoms is preferred from the viewpoint of exhibiting excellent chlorine stability and gas generation suppression effect when the liquid detergent composition is stored in a high-temperature environment for a long period of time. preferable. Examples of commercially available sodium secondary alkanesulfonates having 13 to 17 carbon atoms include the product name "Hostapua SAS30" manufactured by Clariant Japan.

As the component (B), only one type may be used, or two or more types may be mixed and used.

The content of the (B) anionic surfactant in the liquid detergent composition of the present invention is not particularly limited, but the liquid detergent composition is excellent in chlorine stability and gas when stored in a high-temperature environment for a long period of time. From the viewpoint of exhibiting the generation suppressing effect, the lower limit is preferably 0.5% by mass or more, more preferably 1.0% by mass or more, and still more preferably 1.2% by mass or more. It is preferably 5.0% by mass or less, more preferably 4.0% by mass or less, and still more preferably 3.0% by mass or less.

The liquid detergent composition of the present invention contains an alkyldimethylamine oxide having an alkyl or alkylene group with 8 to 18 carbon atoms as component (C). (C) Alkyldimethylamine oxide is not particularly limited as long as it has an alkyl group or alkylene group with 8 to 18 carbon atoms and can be used in a liquid detergent composition.

When the liquid detergent composition is stored in a high-temperature environment for a long period of time, it exhibits excellent chlorine stability and an effect of suppressing gas generation. The alkyldimethylamine oxide having an alkylene group includes (c-1) an alkyldimethylamine oxide having 12 carbon atoms (specifically, dimethyllaurylamine N-oxide) and (c-2) an alkyl group having 8 carbon atoms. and (c-1) an alkyldimethylamine oxide having 12 carbon atoms and (c-2) a carbon atom More preferably, it contains an alkyldimethylamine oxide having an alkyl group of number 8.

When (c-1) an alkyldimethylamine oxide having 12 carbon atoms and (c-2) an alkyldimethylamine oxide having an alkyl group having 8 carbon atoms are used in combination, the mass ratio thereof is preferably 1:3. to 10:1, more preferably 1:2 to 8:1, more preferably 1:1 to 7:1.

As the component (C), only one type may be used, or two or more types may be mixed and used.

The content of (C) alkyldimethylamine oxide having an alkyl group or alkylene group having 8 to 18 carbon atoms in the liquid detergent composition of the present invention is not particularly limited, but the liquid detergent composition is maintained in a high-temperature environment. It exhibits excellent chlorine stability and gas generation suppression effect when stored for a long period of time, and from the viewpoint of viscosity, the lower limit is preferably 0.5% by mass or more, more preferably 1.0% by mass. More preferably, it is 1.5% by mass or more, and the upper limit is preferably 5.0% by mass or less, more preferably 4.0% by mass or less.

When the liquid detergent composition is stored in a high-temperature environment for a long period of time, excellent chlorine stability and gas generation suppression effect are exhibited. , preferably about 5:1 to 1:5, more preferably about 2:1 to 1:3, still more preferably about 1:1 to 1:2.

The liquid detergent composition of the present invention contains an aromatic carboxylic acid or a salt thereof as component (D). (D) The aromatic carboxylic acid or salt thereof is not particularly limited as long as it can be used in the liquid detergent composition.

(D) Specific examples of aromatic carboxylic acids or salts thereof include benzoic acid, salicylic acid, phthalic acid, and salts of these aromatic carboxylic acids. Among these, benzoic acid or a salt thereof is particularly preferred because it exhibits excellent chlorine stability and gas generation suppression effect when the liquid detergent composition is stored in a high-temperature environment for a long period of time, and from the viewpoint of viscosity.

In the component (D), the salt includes, for example, salts of alkali metals such as potassium and sodium, and salts of alkaline earth metals such as magnesium and calcium. Among these, alkali metal salts are preferred, and sodium salts are more preferred.

As the component (D), only one type may be used, or two or more types may be mixed and used.

In the liquid detergent composition of the present invention, the content of (D) aromatic carboxylic acid or salt thereof is not particularly limited, but excellent chlorine stability is obtained when the liquid detergent composition is stored in a high-temperature environment for a long period of time. And, from the viewpoint of viscosity, the lower limit is preferably 0.05% by mass or more, more preferably 0.3% by mass or more, and still more preferably 0.5% by mass or more. The upper limit is preferably 12.0% by mass or less, more preferably 10.0% by mass or less, and even more preferably 8.0% by mass or less.

When the liquid detergent composition is stored in a high temperature environment for a long period of time, excellent chlorine stability and gas generation suppression effect are exhibited, and from the viewpoint of viscosity, the mass ratio of the component (C) and the component (D) is preferably about 1:10 to 20:1, more preferably about 1:8 to 10:1, still more preferably about 1:5 to 5:1.

The liquid detergent composition of the present invention contains a chlorine-based oxidizing agent as component (E). (E) The chlorine-based oxidizing agent is not particularly limited as long as it can be used in the liquid cleaning composition. From the viewpoint of exhibiting an inhibitory effect, chlorites such as sodium chlorite, hypochlorites such as sodium hypochlorite, chlorates such as sodium chlorate, and perchlorates such as sodium perchlorate and chlorinated cyanurates such as sodium dichloroisocyanurate. Among these, sodium hypochlorite or potassium hypochlorite is particularly preferred.

As the component (E), only one type may be used, or two or more types may be mixed and used.

In the liquid detergent composition of the present invention, (E) the chlorine-based oxidizing agent is contained in the liquid detergent composition at an effective chlorine concentration of about 0.1 to 7.0%. It is preferable that the content is about 0.1 to 6.0%. The method for measuring the effective chlorine concentration of the liquid detergent composition is as described in Examples.

The liquid detergent composition of the present invention contains 1.5 to 14.0% by mass of silicic acid or a salt thereof as component (F). The liquid detergent composition of the present invention contains the predetermined amount of (F) silicic acid or a salt thereof in addition to the components (A) to (E) and (G) water described later, thereby When the agent composition is stored in a high-temperature environment for a long period of time, it exhibits excellent chlorine stability and an effect of suppressing gas generation, and can effectively suppress corrosion of light metals such as aluminum.

(F) Silicic acid or a salt thereof is not particularly limited as long as it can be used in a liquid detergent composition, and examples thereof include potassium silicate and sodium silicate.

As the component (F), only one type may be used, or two or more types may be mixed and used.

In the liquid detergent composition of the present invention, the content of (F) silicic acid or a salt thereof is not particularly limited as long as it is within the predetermined amount range. From the viewpoint of exhibiting excellent chlorine stability and gas generation suppression effect, and also effectively suppressing corrosion of light metals such as aluminum, the lower limit is preferably 1.5 mass% or more, more preferably 2 0% by mass or more, and the upper limit is preferably 14.0% by mass or less, more preferably 10.0% by mass or less, and even more preferably 8.0% by mass or less.

The liquid detergent composition of the present invention contains water as component (G). Water is not particularly limited, and includes tap water, distilled water, pure water, ion-exchanged water, and the like. In addition, the water derived from the above components (A) to (G) can also be included in the (G) component of the liquid detergent composition of the present invention.

The content of (G) water in the liquid detergent composition of the present invention is not particularly limited. From the viewpoint of exhibiting excellent chlorine stability and gas generation suppression effect when the liquid detergent composition is stored in a high-temperature environment for a long period of time, the content of (G) water in the liquid detergent composition of the present invention is , The lower limit is preferably 60% by mass or more, more preferably 70% by mass or more, and still more preferably 75% by mass or more, and the upper limit is preferably 90% by mass or less, more preferably 85% by mass or less. mentioned.

The liquid detergent composition of the present invention may contain fragrances, dyes, preservatives, metal corrosion inhibitors, solubilizers, antifoaming agents, sequestering agents, polymer compounds, cloud point improvers, etc., if necessary. It may contain known additives that are added to liquid detergent compositions. Only one type of additive may be used, or two or more types may be mixed and used.

When the liquid detergent composition of the present invention contains the additive, its content is, for example, 5% by mass or less, preferably 2% by mass or less.

The liquid detergent composition of the present invention is liquid in the temperature range of 10-60°C. Specifically, the liquid detergent composition of the present invention preferably has a viscosity of 1000 mPa·s or less, more preferably 500 mPa·s or less, more preferably 100 mPa·s or less, in the temperature range of 10 to 60°C. The following are more preferable. It is particularly preferable that the liquid detergent composition of the present invention has a viscosity of 100 mPa·s or less in an environment of 0° C. and even -5° C.

The method for producing the liquid detergent composition of the present invention is not particularly limited, and the components (A) to (G) and, if necessary, the additives are uniformly dispersed. , by mixing using a stirrer such as a mixer.

The cleaning application of the liquid detergent composition of the present invention is not particularly limited. It can be particularly preferably used for cleaning the outer surface of manufacturing equipment such as filling machines and compounding tanks, freezers, conveyors, floors, and the like.

(Washing soap)
The detergent of the present invention is obtained by mixing the liquid detergent composition of the present invention with dilution water. From the viewpoint of exhibiting excellent foaming power and retention, the cleaning agent of the present invention preferably contains about 2 to 40% by mass of the liquid cleaning composition and about 60 to 98% by mass of dilution water. preferable. Further, it is more preferable that the liquid detergent composition is about 10 to 35% by mass and the dilution water is about 65 to 95% by mass. % of dilution water is more preferable. Dilution water is not particularly limited, and may be tap water, distilled water, pure water, ion-exchanged water, or the like.

The cleaning agent of the present invention is applied to an object to be cleaned in a foamed form using a foam washer, and used for cleaning the object to be cleaned. A specific cleaning method using the cleaning agent of the present invention will be described later.

(Washing method)
The cleaning method of the present invention includes the following steps.
Step of mixing the liquid cleaning composition of the present invention with diluted water to prepare a cleaning agent Step of foaming the cleaning agent and attaching it to an object to be cleaned Rinsing the cleaning agent adhering to the object to be cleaned with rinsing water process

In the cleaning method of the present invention, the details of the liquid cleaning composition are as described above. As described above, the cleaning agent of the present invention is prepared by mixing the liquid cleaning agent composition of the present invention with dilution water. At this time, preferably, about 2 to 40% by weight of the liquid detergent composition and 60 to 98% by weight of diluted water are mixed to prepare the detergent of the present invention.

Next, the cleaning agent is foamed and attached to the object to be cleaned. A foam washing machine can be used as a device for foaming the detergent and adhering it to the object to be washed. As the foam washing machine, one having the function of pressurizing the washing solution and air is used, and among these, one having the function of adjusting the pressure and the flow rate is preferable. Specific examples of commercially available foam cleaners include the product name "FI-10 portable foamer" manufactured by DEMA Co., Ltd., the product name "Forming Cart" manufactured by Spraying System Japan Co., Ltd., and the product name "SK11" manufactured by Fujiwara Sangyo Co., Ltd. Among these, "SK11" is easy to handle and can produce stable foam.

It is desirable to leave the foamed cleaning agent adhered to the object to be washed for about 1 to 20 minutes while adhering to the object to be washed. This makes it easier for the foamy cleaning agent to adhere to dirt on the object to be cleaned, thereby enhancing the cleaning effect.

Next, a step of rinsing the cleaning agent adhering to the object to be cleaned with rinsing water is performed. The step of rinsing with rinsing water can be performed, for example, by injecting rinsing water from fixed or movable injection nozzles. As rinsing water, tap water or soft water can be used, and tap water is usually used. Although the temperature of the rinsing water is not particularly limited, it is preferably about 25 to 50° C. from the viewpoint of rinsing efficiency.

Furthermore, after rinsing the cleaning agent with rinsing water, the object to be cleaned may be dried if necessary. Although the drying method is not particularly limited, it is usually carried out by exposing the object to be cleaned to air at 10 to 50° C. for 30 to 60 minutes. The drying step may be natural drying, drying by blowing air at a predetermined temperature, or drying by heating if necessary.

In the cleaning method of the present invention, the object to be cleaned is not particularly limited. , filling machines, outer surfaces of manufacturing equipment such as compounding tanks, freezers, conveyors, floors, etc.).

Since the liquid detergent composition of the present invention is excellent in chlorine stability and gas generation suppression effect when stored in a high-temperature environment for a long period of time, the cleaning method of the present invention is suitably performed even in a high-temperature environment. be able to. A high-temperature environment in which the cleaning method of the present invention is performed means, for example, cleaning performed in an environment of 30 to 50°C.

EXAMPLES The present invention will be described in detail below with reference to examples and comparative examples. However, the invention is not limited to the examples. The details of each component used in Examples and Comparative Examples are as follows.
・ Potassium hydroxide (liquid active ingredient 48%)
・Sodium hydroxide (liquid active ingredient 48%)
・ Sodium secondary alkanesulfonate (product name “Hostapua SAS30” manufactured by Clariant Japan, active ingredient 30%))
・ Dimethylmyristylamine N-oxide (product name “GENAMINOX MY” manufactured by Clariant Japan Co., Ltd., active ingredient 28%)
・Dimethyllaurylamine N-oxide (manufactured by Kao Corporation, product name “Amphitol 20N”, active ingredient 35%)
・ Dimethyloctylamine N-oxide (product name “GENAMINOX OC” manufactured by Clariant Japan Co., Ltd., active ingredient 30%)
・Sodium benzoate (100% purity)
・Sodium hypochlorite (effective chlorine concentration 12%)
・ Potassium silicate aqueous solution (product name “1K potassium silicate” manufactured by Nippon Kagaku Kogyo Co., Ltd., active ingredient 50%)
・ Octylic acid (product name “Octylic acid” manufactured by KH Neochem Co., Ltd., active ingredient 99%)
・ Sodium cumene sulfonate (product name “Teika Tox N5040” manufactured by Tayka Co., Ltd., active ingredient 40%)
・ Sodium 2-phosphonobutane-1,2,4-tricarboxylate (product name “Cherest PH435” manufactured by Cherest Co., Ltd., active ingredient 40%)
・Ion-exchanged water

(Preparation of liquid detergent composition)
[Examples 1 to 8 and Comparative Examples 1 to 5]
The components (A) to (G) were mixed so as to have the composition shown in Table 1 to produce a liquid detergent composition. In Table 1, the unit of the numerical value of each component is % by mass, which is the value converted to the amount (content) of the active ingredient of each component in the liquid detergent composition. However, sodium hypochlorite is expressed as effective chlorine concentration (%) in the liquid detergent composition measured by the following measuring method. In Table 1, the water as the component (G) is the total content of the mixed ion-exchanged water and the water derived from each component (i.e., the total content of water contained in the liquid detergent composition). ). Moreover, in Comparative Examples 3 and 4, the components shown in Table 1 were blended as a viscosity reducing agent and a metal corrosion inhibitor, referring to Patent Documents 1 and 2.

(Method for measuring effective chlorine concentration)
The effective chlorine concentration of each liquid detergent composition obtained above was measured by the following method. An aqueous solution of 1 g of potassium iodide and 10 mL of an aqueous glacial acetic acid solution are added to 1 g of the liquid detergent composition, and the mixture is sufficiently mixed to prepare a mixed solution. Next, the mixed solution is titrated with a 0.1 M aqueous solution of sodium thiosulfate, and the point at which the brown color disappears and becomes colorless is taken as the end point. Based on the dropping amount of the sodium thiosulfate aqueous solution used until reaching the end point, the effective chlorine concentration is calculated by the following formula.
Effective chlorine concentration [%] = drop amount [mL] of sodium thiosulfate aqueous solution x 0.3546 / mass [g] of liquid cleaning composition

Each of the liquid detergent compositions obtained above was mixed with diluted water to prepare a detergent, and the foaming power and retention of each detergent were evaluated by the following methods. In addition, the chlorine stability in room temperature environment and high temperature environment of each liquid detergent composition obtained above and the gas generation suppression property in high temperature environment were evaluated by the following methods. Each evaluation result is shown in Table 1.

<Evaluation of chlorine stability in room temperature environment>
Each liquid detergent composition is placed in an airtight container and placed in a constant temperature bath at room temperature (25°C). After being stored for 30 days as it is, the effective chlorine concentration of the liquid detergent composition is measured. The ratio of "available chlorine concentration after 30 days" after storage at room temperature for 30 days to "initial available chlorine concentration" immediately after production (residual ratio of available chlorine concentration) is calculated by the following equation.
Residual rate of effective chlorine concentration [%] = Effective chlorine concentration after 30 days [%] / Initial effective chlorine concentration [%] × 100
Furthermore, the calculated residual ratio of available chlorine concentration is evaluated according to the following evaluation criteria. Each evaluation result is shown in Table 1.
A: Residual rate is 90% or more.
○: Residual rate is 70% or more and less than 90%.
Δ: The residual rate is 60% or more and less than 70%.
x: Residual rate is 50% or more and less than 60%.
XX: The residual rate is less than 50%.

<Evaluation of chlorine stability in high temperature environment>
Each liquid detergent composition is placed in a closed container and placed in a constant temperature bath at 40°C, in the same manner as <Evaluation of chlorine stability in room temperature environment> above, to evaluate the residual rate of effective chlorine concentration. . Each evaluation result is shown in Table 1.

<Evaluation of gas generation suppression characteristics in high temperature environment>
5 g of each liquid detergent composition to which Ni was added so as to have a concentration of 1 ppm was placed in a container and stored in a constant temperature water bath at 50° C. for 2 hours. (The bubbles collected at the top of the container were visually observed from the outside to compare the sizes). Each evaluation result is shown in Table 1.
(double-circle): The bubble which can be confirmed visually is not generated.
◯: Generation of extremely small bubbles was confirmed.
Δ: Bubbles with a size of about 0.1 to 0.5 ml were confirmed.
×: Bubbles with a size exceeding 0.5 ml were confirmed.

<Aluminum Corrosion Prevention Test>
As a test piece, an aluminum (A1050P, length 75 mm×width 25 mm×thickness 0.8 mm) treated with acetone in advance and dried was used. A test piece was immersed in 40 ml of a cleaning solution obtained by diluting each liquid cleaning composition to 5% by mass with tap water, and allowed to stand in a thermostat at 20° C. for 30 minutes. After the immersion, the test piece was taken out, rinsed with tap water and dried, and the appearance of the surface of the test piece was visually observed to determine the aluminum corrosion prevention property according to the following criteria. Each evaluation result is shown in Table 1.
○: Almost no corrosion ×: Corroded

<Measurement of viscosity>
The viscosity of each liquid detergent composition at a temperature of 20°C and a temperature of -5°C was measured as follows. A Brookfield viscometer (manufactured by TOKIMEC) was used to measure the viscosity, and the temperature of each liquid detergent composition was adjusted to 20°C or -5°C. NO. Using rotors 1 to 3 (NO.1 is used at a viscosity of 100 mPa or less, NO.2 is used at a viscosity of 1000 mPa or less, and NO.3 is used at a viscosity of 1000 to 10000 mPa), the rotation speed is 6 to 60 rpm. The viscosity was measured by using a vacuum cleaner, and the value was read 60 seconds after the start of rotation. Each evaluation result is shown in Table 1. In this test, samples with a viscosity of 100 mPa·s or less in both environments of 25° C. and -5° C. were judged to pass.

In Table 1, "-" indicates unimplemented. In addition, in Comparative Example 1, when each component was mixed, the mixed liquid became cloudy and separated, so each evaluation such as chlorine stability was not performed.

Claims (10)

(A) an alkaline agent;
(B) an anionic surfactant;
(C) an alkyldimethylamine oxide having an alkyl group having 8 to 12 carbon atoms;
(D) benzoic acid or a salt thereof;
(E) hypochlorite ;
(F) silicic acid or a salt thereof;
(G) water;
including
The content of the (A) alkaline agent is 0.1 to 8.0% by mass,
A liquid detergent composition, wherein the content of (F) silicic acid or a salt thereof is 1.5 to 13.5% by mass. The (C) alkyldimethylamine oxide having an alkyl group having 8 to 12 carbon atoms has (c-1) an alkyldimethylamine oxide having 12 carbon atoms and (c-2) an alkyl group having 8 carbon atoms. 2. The liquid detergent composition of claim 1, comprising at least one alkyldimethylamine oxide. The mass ratio of (C) alkyldimethylamine oxide having an alkyl group having 8 to 12 carbon atoms and (D) benzoic acid or a salt thereof is 1:10 to 20:1, or 3. The liquid detergent composition according to 2. Claims 1 to 3, wherein the mass ratio of (B) the anionic surfactant and (C) the alkyldimethylamine oxide having an alkyl group having 8 to 12 carbon atoms is 5:1 to 1:5. The liquid detergent composition according to any one of . The liquid cleaning according to any one of claims 1 to 4, wherein the (E) hypochlorite is contained in an amount such that the available chlorine concentration in the liquid cleaning composition is 0.1 to 7.0% by mass. agent composition. 6. The liquid detergent composition according to any one of claims 1 to 5, which is used for cleaning equipment for manufacturing food and drink. The liquid detergent composition according to any one of claims 1 to 6, wherein the content of water (G) is 60 to 90% by mass. A cleaning agent comprising 2 to 40% by mass of the liquid cleaning composition according to any one of claims 1 to 7 and 60 to 98% by mass of dilution water. 9. A cleaning agent according to claim 8, in foamed form. a step of mixing the liquid detergent composition according to any one of claims 1 to 7 with dilution water to prepare a detergent;
a step of foaming the cleaning agent and attaching it to an object to be cleaned;
a step of rinsing the cleaning agent adhering to the cleaning object with rinsing water;
A cleaning method comprising: